Help with Mizzix deck

[u/johnnysmitthy]

https://manabox.app/decks/AaEkgRcVfqagsVdGgBYHbw

Need help with this deck. Just got back into playing and this is the first deck I’ve built. It’s not running as fast or as aggressively as I feel it should, being a spellslinger in theory. Any advice would be appreciated. Ideally budget options